TWI530300B - Foam-like skin coating agent - Google Patents

Description

Foamy skin coating agent

This invention relates to a foamy skin coating agent containing carbon dioxide.

Carbon dioxide (CO ₂ ), if it acts on the skin, promotes blood circulation in the skin. Therefore, the manufacturer has proposed various cosmetic materials containing carbon dioxide. For example, it is disclosed that a carbon dioxide-saturated solution having a higher concentration is supplied to a cosmetic material containing carbon dioxide, and a carbon dioxide-saturated solution having a higher concentration is supplied in a coexistence of ethanol or the like which exhibits a solubility higher than that of water (Patent Document 1). Further, a method of maintaining the ejection liquid in a high viscosity in order to suppress the volatilization of carbon dioxide, or a method of allowing the polyhydric alcohol to coexist at a high concentration in order to maintain the carbon dioxide concentration is known (Patent Documents 2 to 3).

On the other hand, among a large amount of aerosols, in order to form a foam, a liquefied petroleum gas (LPG) containing propane, isobutane and n-butane as a jet gas is used. However, liquefied petroleum gas has a problem that it is highly flammable and has poor foaming properties at low temperatures. As a technique for solving this problem, for example, it is known that carbon dioxide is contained together with an aqueous liquid solution containing water and a surfactant, and liquefied petroleum gas, and the safety is high, and the foaming property is not bad at a low temperature. The aerosol foam composition (Patent Document 4); in addition to the liquefied gas of 0 to 4% by mass, in addition to the liquefied gas of the raw liquid, a non-combustible aerosol-type foam product which is pressurized by a compressed gas such as carbon dioxide ( Patent Document 5). It is also known that a raw material containing only an aqueous solution of an active ingredient contains a propellant composed only of n-butane and carbon dioxide, and has a low ignitability and excellent low-temperature foaming property compared with liquefied petroleum gas. A foaming aerosol composition having high temperature and safety (Patent Document 6), but n-butane is expensive.

Further, as an aerosol agent for promoting blood circulation using carbon dioxide together with a hydrocarbon oil, it is known to use a specific hydrocarbon such as isopentane or n-pentane in carbon dioxide to improve the foaming property of the foaming agent of the foaming agent. A skin blood circulation promoting agent (Patent Document 7), but does not disclose the effect of foam retention at a low temperature or when reducing the internal pressure of a pressure vessel.

[Patent Document 1] Japanese Patent Laid-Open No. 59-141512

[Patent Document 2] Japanese Patent Laid-Open No. Hei 11-228334

[Patent Document 3] Japanese Patent Laid-Open No. Hei 11-171755

[Patent Document 4] Japanese Patent Laid-Open Publication No. 2001-72543

[Patent Document 5] Japanese Patent Laid-Open No. 09-59606

[Patent Document 6] Japanese Patent No. 3587547

[Patent Document 7] Japanese Patent Laid-Open Publication No. 2005-2046

An object of the present invention is to provide a foam-like skin coating which has a low internal pressure in a container and which maintains a good foam at a low temperature and allows carbon dioxide to act on the skin for a long period of time to obtain a sufficient blood circulation promoting effect. Agent.

Therefore, the present inventors conducted various studies in order to obtain a coating agent which can impart a good blood circulation promoting action by retaining carbon dioxide for a long time on the skin, and as a result, it was found that the vapor pressure at 35 ° C was 0.1 MPa. The above hydrocarbon mixture having a saturated hydrocarbon of less than 0.5 MPa as a main component has a carbon number of 3 to 5, and carbon dioxide which can be dissolved at a high concentration can be obtained, and when it is sprayed onto the skin, the foam containing a high concentration of carbon dioxide remains on the skin for a long time. In the above, a foam-like skin coating agent which forms a good foam at a low temperature and which has a good blood circulation promoting action can be formed.

That is, the present invention provides a foam-like skin coating agent which is obtained by filling a composition of a liquid and a gas into a pressure-resistant container so that the internal pressure is less than 0.7 MPa at 25 ° C, and the composition of the liquid and gas Contains the following ingredients (A), (B) and (C):

(A) carbon dioxide

(B) a hydrocarbon mixture selected from the group consisting of a hydrocarbon having a carbon number of 3 to 5, and a vapor pressure of 35 MPa or more and a saturated hydrocarbon content of less than 0.5 MPa in the above mixture of 70 to 100% by mass. 0.1~3 mass%

(C) the surfactant is 0.1 to 25% by mass, and

The mass ratio of (A) to (B) (A:B) is 35:65 to 95:5.

The foamy skin coating agent of the present invention has a low pressure of less than 0.7 MPa in the inner pressure of the container, and the foam containing high concentration of carbon dioxide when being sprayed onto the skin can be kept on the skin for a long time, and the foam is spread on the skin. In order to obtain an excellent blood circulation promoting effect on the skin. Further, since the foam to be ejected is also stable at a low temperature, massage or the like can be easily performed on the skin.

The foamy skin coating agent of the present invention is obtained by filling a composition containing a liquid and a gas of the above components (A), (B) and (C) into a pressure-resistant container.

The carbon dioxide of the component (A) is an active ingredient of the foamy skin coating agent of the present invention filled in a gas pressure container in a pressure-resistant container, and is also a component which also functions as a propellant, and a part thereof is dissolved in a withstand voltage. In the liquid in the container, foaming occurs when it is applied to the skin. Further, on the skin, the gaseous carbon dioxide in the foam and the carbon dioxide dissolved in the liquid portion have an effect of promoting blood circulation of the skin. Therefore, it is preferred that carbon dioxide is present in the liquid at a high concentration in the container. The amount of carbon dioxide dissolved in the pressure vessel in the above-mentioned pressure vessel is preferably from 500 to 25,000 ppm, more preferably from 1,000 to 20,000 ppm, in terms of sufficient effect when applied to the skin. Good is 5,000~18,000ppm.

As for the hydrocarbon mixture of the component (B), when the foamy skin coating agent of the present invention is applied to the skin, it is foamed together with carbon dioxide, and has a function of forming a foam containing carbon dioxide at a high concentration. In order to maintain the coating agent of the present invention at a temperature of 25 ° C under a pressure vessel of less than 0.7 MPa and to have good foam quality and blood circulation promoting effect when ejected, it is important that the above hydrocarbon mixture is at 35 ° C. The saturated hydrocarbon having a vapor pressure of 0.1 MPa or more and less than 0.5 MPa is 70 to 100% by mass, and particularly preferably 80 to 100% by mass, more preferably 90%, in terms of improving the effect at the time of use. 100% by mass, particularly preferably 95 to 100% by mass. Examples of the saturated hydrocarbon having a vapor pressure at 35 ° C of 0.1 MPa or more and less than 0.5 MPa include isobutane (0.46 MPa) having a carbon number of 4, n-butane (0.33 MPa), and a carbon number of 5 Pentane (0.23 MPa), isopentane (0.13 MPa), and the like. Among them, isobutane and n-butane are preferred in terms of good foam at a low temperature, and it is particularly preferable to use n-butane and isobutane in combination with economical efficiency. Further, as the hydrocarbon having 5 carbon atoms, isopentane is preferred.

Further, in order to dissolve carbon dioxide in the liquid in the pressure-resistant container, it is preferred to lower the vapor pressure of the hydrocarbon mixture, and it is preferable to use iso-pentane in addition to isobutane having a carbon number of 4 or n-butane. alkyl. When isopentane is used in combination, it is preferred that isopentane is 0.1 to 1.8% by mass in all the compositions in the pressure resistant container, and more preferably 0.1 to 1.2% by mass in terms of blood circulation promoting effect. Particularly preferred is 0.1 to 0.9% by mass.

Further, examples of the saturated hydrocarbon having a vapor pressure of more than 0.5 MPa at 35 ° C include propane (1.25 MPa) and the like. Usually, the liquefied petroleum gas (LPG) is a mixture of propane and butane, and a mixed gas in which the ratios have been adjusted is circulated according to the purpose. In the present invention, in order to obtain a foam which is made to have a high pressure in a pressure-resistant container and which contains carbon dioxide at a high concentration and can be kept on the skin for a long period of time, it is preferred that the hydrocarbon content at a higher vapor pressure at 35 ° C is higher. less. It is preferred that the propane is not substantially formulated, but in view of industrial availability, the n-butane and/or isobutane:propane (mass ratio) contained in the LPG is preferably 70 to 100:0 to 30. The better is 90~99.9: 0.1~10, especially good is 97~99.5:0.5~3.

In a preferred embodiment of the hydrocarbon mixture having 3 to 5 carbon atoms, the hydrocarbon having 5 carbon atoms is B1, the hydrocarbon having 4 carbon atoms is B2, and the hydrocarbon having 3 carbon atoms is B3. :B2: B3 (mass ratio) is better composed of 0~75:15~100:0~30, and better is 0~75:20~99:0.1~3, especially good is 0~ 50:49~99: a mixture of hydrocarbons of 0.5~1 composition. Further, the content of B2 is preferably from 0.1 to 3% by mass, more preferably from 0.1 to 2% by mass, particularly preferably from 0.3 to 1.5% by mass, based on all the components in the pressure-resistant container.

In the present invention, the content of the component (B) is 0.1 to 3% by mass in all the compositions in the pressure resistant container, but it is preferable in terms of satisfying both good foaming and blood circulation promoting effects. It is 0.2 to 2.5% by mass, and particularly preferably 0.5 to 2% by mass.

Further, as for the mass ratio (A:B) of the components (A) to (B) filled in the pressure-resistant container, it is important to satisfy both the good foam and the blood circulation promoting effect. :65~95:5, in terms of blood circulation promoting effect, 45:55~95:5 is better, especially 55:45~90:10, especially good 60:40~85 :15.

In the present invention, the surfactant of the component (C) is contained in a liquid and the component (B) is dispersed or emulsified, and the foamy skin coating agent of the present invention is applied to the skin to improve the stability of the foam. As the surfactant, one of a nonionic surfactant, an anionic surfactant, a cationic surfactant, an amphoteric surfactant, or the like may be used alone or in combination of two or more kinds depending on the form of the foamy skin coating agent. They are used in combination as appropriate. For example, when the foamy skin coating agent is in the form of a detergent composition, an anionic surfactant may be used alone, or a nonionic surfactant and other surfactants may be used in combination, and a foamy moisturizing liquid may be used. In the case of a non-washing skin care cosmetic such as a foamy cosmetic liquid, it is preferred to use a nonionic surfactant alone or in combination with other surfactants.

Examples of the nonionic surfactant include propylene glycol fatty acid ester, glycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, and polyoxygen. Ethylene sorbitol fatty acid ester, polyethylene glycol fatty acid ester, polyglycerin fatty acid ester, sucrose fatty acid ester, pentaerythritol fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, poly Oxyethylene alkyl phenyl ether, polyoxyethylene polyoxypropylene diol, polyoxyethylene castor oil, polyoxyethylene hardened castor oil, polyoxyethylene alkylamine, polyoxyethylene fatty acid decylamine, alkyl alkanolamine A modified fluorenone such as an alkyl glyceryl ether, an alkyl glucoside, an alkyl polyglucoside, an amino acid ester or a polyether modified fluorenone, or an alkylpolysaccharide.

Examples of the anionic surfactant include alkyl sulfate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl ether acetate, N-decylamino acid salt, alkyl phosphate, and polyoxyethylene. Alkyl ether phosphate, fatty acid salt, N-mercapto tauryl salt, alkyl sulfonate, alkyl sulfoacetate, alkyl sulfosuccinate, polyoxyethylene alkyl sulfosuccinate, etc. . Examples of the salt include an alkali metal salt such as sodium, potassium or lithium, an alkanolamine salt such as triethanolamine, diethanolamine or monoethanolamine, and a basic amino acid salt such as aminic acid or arginine.

The cationic surfactant may, for example, be an alkyltrimethylammonium salt, a dialkyldimethylammonium salt, an alkoxypropyltrimethylammonium salt or an alkylbenzyldimethylammonium salt. Ammonium or amine salt. By adding these components, in addition to the foaming property, a bactericidal action, a care effect, an antistatic effect, and the like can be obtained.

As an amphoteric surfactant, in order to enhance the foaming power and the like, it may be added as needed: alkyl dimethyl amine oxide, alkyl dimethyl amino acetic acid betaine, alkyl guanamine propyl betaine, alkyl sulfo group Betaine, alkyl hydroxy sulfobetaine, alkyl carboxymethyl hydroxyethyl imidazolinium betaine, and the like.

Among these, it is preferred to use one or more selected from the group consisting of a nonionic surfactant and an anionic surfactant. As the nonionic surfactant, preferred are glycerin fatty acid esters, polyoxyethylene glycerin fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol. Fatty acid ester, polyethylene glycol fatty acid ester, polyglycerin fatty acid ester, sucrose fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene hardened castor oil, polyoxyethylene alkylamine, polyoxyethylene fatty acid decylamine , alkyl alkanolamine, alkyl glyceryl ether, alkyl polyglucoside, amino acid ester, and the like. Further, as the anionic surfactant, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl ether acetate, N-decylamino acid salt, alkyl phosphate, fatty acid salt or the like is preferable. Among these surfactants, those having an alkyl chain having a carbon number of 8 to 16 are preferred in terms of stability of the foam on the skin.

Among these surfactants, the above-mentioned nonionic surfactant, polyoxyethylene alkyl ether sulfate, and the like are particularly preferable in terms of foaming property, foam stability on the skin, and foam touch. A polyoxyethylene alkyl ether acetate, an N-decylamino acid salt or an alkyl phosphate is used in combination.

In terms of the stability of the foam on the skin and the feel of the foam, it is preferred that the amount of the surfactant is large, and on the other hand, in terms of skin irritation, etc., due to a large amount of use The problem of irritation or the like is generated, so that the surfactant is preferably in the range of 0.1 to 25% by mass in the total amount of all the compositions in the container. In particular, in a rinsing agent such as a detergent or a massage agent, it is preferably 2 to 20% by mass, more preferably 4 to 16% by mass. Further, it is preferably from 0.1 to 10% by mass, more preferably from 0.2 to 6% by mass, particularly preferably from 0.3 to 3% by mass, in the system in which the emulsion or the lotion is directly left on the skin.

As for carbon dioxide, carbon dioxide is not formed in an alkaline environment, so that a blood circulation promoting effect is not produced. Therefore, in order to obtain an excellent blood circulation promoting effect by dissolving carbon dioxide in a high concentration, the pH of the above composition is preferably from 2.5 to 7, particularly preferably from 4.5 to 6.5. As the pH adjuster for adjusting the pH to the above ranges, for example, an organic acid such as citric acid, malic acid or tartaric acid or a salt thereof, or phosphoric acid or a salt thereof can be used.

In the foamy skin coating agent of the present invention, in order to stably maintain the dispersed or emulsified state of the above component (B) and to maintain carbon dioxide in the foam applied to the skin to satisfy a good blood circulation promoting effect, the filling is performed. The viscosity of the liquid to the pressure vessel is preferably from 100 to 500,000 mPa‧s, more preferably from 200 to 200,000 mPa‧s, particularly preferably from 300 to 50,000 mPa‧s. In particular, in order to prevent separation of the above component (B) in the pressure-resistant container and to obtain a good foam, it is preferably 100 mPa·s or more. On the other hand, in consideration of the discharge property, the foam state, and the industrially stable production, when the pressure vessel is a spray container having a single-chamber structure, it is preferably 200 to 2,000 mPa ‧ s at the above-mentioned pressure resistance. When the container is a double-structured aerosol container, it is preferably 1,000 to 50,000 mPa ‧ s.

In order to adjust the viscosity of the liquid filled into the pressure resistant container, it is preferred to use (D) a viscosity adjusting agent. As the viscosity modifier, any of a synthetic system, a semisynthetic system, and a natural polymer can be used. Examples of the synthesis system include a carboxyvinyl polymer, an alkyl acrylate copolymer, an acrylic acid acrylate alkyl copolymer, and acrylic acid. ‧ An alkyl methacrylate copolymer or an acrylic polymer of sodium polyacrylate, and a synthetic polymer such as polyvinyl alcohol, polyvinylpyrrolidone, polyethylene glycol, or polymer fluorenone. Further, examples of the semi-synthetic system or the natural system include polysaccharide-based polymers, specifically, microcrystalline cellulose, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, and hydroxyl group. Cellulose polymers such as propylmethylcellulose, carboxymethylcellulose, and cationized cellulose; Sanxianjiao, hydroxypropyltrifoliate, amylopectin, cyclodextrin, polydextrose ), microbial polymers such as curdlan and amber xylan; starch-based polymers such as starch, soluble starch, carboxymethyl starch, methyl starch, and starch phosphate; guar gum, Guar gum-based polymers such as cationized guar gum and hydroxypropylated guar gum; alginic acid polymers such as propylene glycol alginate and sodium alginate; carrageenan, agar, and glutinous gum (quince Seed gum), mannan, dextrin, dextrin fatty acid ester, Locust bean gum, Arabian Gum, tragacanth gum, pectin ), chitin, etc. The content of the viscosity modifier is preferably from 0.01 to 10% by weight, particularly preferably from 0.05 to 5% by weight, based on the total amount of all the components in the container.

Among these, in terms of foam stability of carbon dioxide, it is preferred to contain an acrylic polymer, and it is preferred to use a polysaccharide-based polymer in combination. The content of the acrylic polymer is preferably 0.05 to 3% by weight, particularly preferably 0.05 to 2% by weight, based on the total amount of all the components in the container. Further, when a polysaccharide-based polymer is used in combination with the acrylic polymer, the polysaccharide is preferably 0.01 to 5% by weight, particularly preferably 0.05 to 3% by weight, based on the total amount of all the components in the container. .

For example, the foamy skin coating agent of the present invention is in the form of a detergent, and polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl ether acetate, N-decylamino acid salt, alkyl phosphate is used. When an anionic surfactant is used as the surfactant, it is preferred to use one or two or more kinds of the polysaccharide-based polymer alone or in combination with the polysaccharide-based polymer. More specifically, it is preferred to use at least one of an acrylic polymer and an N-mercaptoamino acid acid in combination with an alkyl polymer and a polysaccharide polymer in an alkyl phosphate. It is preferred to use an acrylic polymer and a cellulose polymer in one or more selected from the group consisting of polyoxyethylene alkyl ether sulfates and polyoxyethylene alkyl ether acetates.

The foamy skin coating agent of the present invention may further contain water, alcohols, oils, humectants, perfumes, plant extracts, bactericides, preservatives, chelating agents, and the like.

The foamy skin coating agent of the present invention is produced by filling the above components (A), (B), (C) and other components into a pressure-resistant container. For example, after filling the pressure-resistant container with the liquid containing the component (C), the component (A) carbon dioxide and the component (B) hydrocarbon mixture are further filled. At this time, other injection gases may be filled as needed.

The pressure-resistant container may be in the form of a foam which can be ejected in a foam form. For example, a can of a single-chamber structure made of metal such as aluminum or tinplate can be used, and as a container material, if it is at a pressure limit. In the inside, a synthetic resin container such as an acetal resin or a polycarbonate resin, glass, or the like can be used. In particular, when the high-pressure carbon dioxide is filled once in the industry, it is preferable to adjust the impact tank of the aluminum container wall thickness. Further, depending on the viscosity of the stock solution, a double container having an inner bag in the pressure resistant container can also be used. In the case of a double container, the spray composition of the present invention is filled into the inner bag, and another spray gas is filled between the pressure resistant container and the inner bag. The injecting gas can be used if it is a gas used for usual spraying.

The pressure in the pressure-resistant container is less than 0.7 MPa at 25 ° C, and in terms of obtaining a good foam, it is preferably 0.4 MPa or more and less than 0.7 MPa, more preferably 0.45 MPa or more and less than 0.7. MPa, particularly preferably 0.5 to 0.65 MPa.

It is preferred to apply the foamy skin coating agent of the present invention to the skin to spread the generated foam on the skin. Here, as a method applied to the skin, it can be directly sprayed onto the desired skin and allowed to form a foam at the portion; it can also be sprayed onto the hand to form a foam, and the foam is applied to the desired one. On the skin. The foam formed by the foam coating agent of the present invention can be kept stable for a long period of time, and even if it is subjected to an operation for diffusing it on the skin, a gentle massage or the like is stable, a high concentration of carbon dioxide acts on the skin for a long time, and is produced. Excellent blood circulation promoting effect.

Therefore, the foamy skin coating agent of the present invention can be used as a cosmetic or external preparation for skin, and can be used as a detergent for a skin detergent, a hair detergent, a makeup remover, a massage agent, a pack mask agent, and a milk. Cream, lotion, lotion, gel, beauty liquid, skin care agent, hair conditioner, makeup, aroma, deodorant, decolorizer, hair removal, hair removal, hair growth, hair growth And a coating agent for preventing or treating acne, etc., a wiping agent, a coating agent for preventing or treating edema or edema, a wiping agent, and the like. According to these uses, the active ingredients thereof can be adjusted. For example, for cosmetics (including washing materials), in addition to the above humectants, sunscreen agents (UV-A and/or UV-B absorbents ‧reflecting agents), whitening agents, slimming agents, deodorants may also be used. It inhibits antiperspirants, shrinkage agents, cooling agents, various synthetic vitamins as wrinkles and aging inhibitors, natural vitamins and derivatives thereof, amino acids and derivatives thereof. As an active ingredient of the hair growth and hair growth materials, various blood flow promoters, plant extracts, and the like can be used. As a massage or wiping agent, various anti-inflammatory agents or local anesthetics, anti-inflammatory analgesics, antihistamines, bactericides and the like can be added.

[Examples] Examples 1-8 and Comparative Examples 1~4

According to the description of Table 1, the components other than A and B are mixed to prepare a stock solution (liquid component), and after filling into a pressure resistant container, the hydrocarbon mixture (B) and carbon dioxide (A) are sequentially filled to obtain an aerosol composition. . After the obtained aerosol composition was stored at 25 ° C for 1 week, foam stability and skin blood flow were evaluated. At this time, the pH was less than 7 in all the compositions. The viscosity was measured using a BM type viscometer (Dongji Industry Co., Ltd.), and the measurement temperature was set to 25 ° C, and the measurement was performed by rotor No. 2, 30 r/min, and 1 minute measurement conditions. Further, the amount of the fragrance in the table was 0.03 mass%.

(test methods) (1) Carbon dioxide concentration

The foam was sprayed at 25 ° C and the carbon dioxide concentration was measured. The carbon dioxide measuring device uses a carbon dioxide electrode module 9502BN manufactured by Orion.

(2) Foam stability

The foam was sprayed on the skin to a thickness of 3 cm Φ, and the evaluation was continued for 2 minutes.

○: foam is formed and kept for 2 minutes

△: Although foam is formed, it collapses

×: no foam formed

(3) skin blood flow

The foam was sprayed on the front wrist to make it 3 cm Φ. After 2 minutes, the foam was wiped off, and the state of the skin (skin red tide) was visually observed.

◎: See a clear red tide

○: See the red tide

△: A little red tide

×: No red tide was seen

As a result, it was found that in Examples 1 to 8 of the present invention, carbon dioxide was dissolved at a high concentration, and the foam stability at 25 ° C was good, and a red tide of the skin was observed. Further, regarding the blood flow of the skin, after the foam was sprayed on the front wrist in the same manner as (3) and wiped off, the skin was measured after 5 seconds using an instant blood flow imaging device FLPI (manufactured by Moor Instruments, moorFLPI). The blood flow of the tissue was compared with the blood flow when the skin was not applied, and as a result, the blood flow of the skin redness was increased.

In Table 1, when the ratio of the component (A) was 30% by mass or less (Comparative Example 1), no red tide of the skin was observed, and almost no blood flow promoting action was observed. Further, when the ratio of the component (A) is 100% by mass, that is, when the component (B) is not contained (Comparative Example 2), the skin red tide can be clearly seen, the blood flow promoting effect is also remarkably increased, but the foam collapses, the foam Poor stability. Further, when a hydrocarbon mixture having a vapor pressure of 35 MPa or more and a saturated hydrocarbon content of less than 0.5 MPa contained in the component (B) of less than 70% by mass (Comparative Example 3) is used, the internal pressure is exceeded. 0.7MPa. Further, since the composition liquid of Comparative Example 4 having a low viscosity was separated, evaluation could not be performed.

Examples 9 to 14 and Comparative Example 5

According to the description of Table 2, the components other than A and B were mixed to prepare a stock solution, and the stock solution, carbon dioxide, and a hydrocarbon mixed gas were sealed in a pressure-resistant container to obtain a spray composition. After the resulting spray composition was stored at 25 ° C for 1 week, foam stability and skin blood flow were evaluated. At this time, the pH was less than 7 in all the compositions. Further, the amount of the fragrance in the table was 0.03 mass%.

As a result, it was found that in Examples 9 to 14 of the present invention, carbon dioxide was dissolved at a high concentration, and the foam stability at 25 ° C was good, and a red tide of the skin was observed. In Comparative Example 5 using only isopentane as the component (B), the foam at a low temperature (5 ° C) was liable to collapse.

Examples 15 and 16

The foamy moisturizing liquid (Example 15) and the foamy cosmetic liquid (Example 16) described in Table 3 were prepared, and after storage for one week at 25 ° C, foam stability and skin blood flow were evaluated. Further, the pH (25 ° C) of each stock solution was measured and described together in Table 3. Further, in the measurement of the pH, a pH meter (F-52 manufactured by Horiba, Ltd.) was used. The foam stability is good, and the effect of skin blood flow is also seen. Further, the amount of the fragrance in the table was 0.03 mass%.

Examples 17-22

The foamy skin coating agent described in Table 4 was prepared, and foam stability and skin blood flow were evaluated after storage at 25 ° C for 1 week. Further, the pH values (25 ° C) of each stock solution are collectively shown in Table 4. The foam stability is good, and the effect of skin blood flow is also seen.

*1 n-butane: isobutane: propane = 71:28:1 mass%

*2 EMAL 270J (Kao Corporation)

*3 KAO AKYPO RLM-45 (Kao Corporation)

*4 Amisoft CS-11(F) (Ajinomoto Co., Ltd.)

*5 Amilite ACS-12 (Ajinomoto Co., Ltd.)

*6 Aminofoamer FLDS-L (ASAHI KASEI CHEMICALS)

*7 MYDOL 10 (Kao Corporation)

*8 Sunsoft M-12J (Sun Chemical Co., Ltd.)

*9 EMANON 1112 (Kao Corporation)

*10 CARBOPOL 981 (Lubrizol Advanced Materials, Inc.)

*11 PEMULEN TR-1 (Lubrizol Advanced Materials, Inc.)

*12 KELDENT (Greater Japan Sumitomo Pharmaceutical Co., Ltd.)

*13 HEC DAICEL SE850 (Dasai Chemical Industry Co., Ltd.)

*14 HPC-H (Japan Soda Co., Ltd.)

*15 METOLOSE 60SH-4000 (Shin-Etsu Chemical Industry Co., Ltd.)

Claims (12)

A foam-like skin coating agent which is prepared by filling a composition containing a liquid and a gas into a pressure-resistant container so that the internal pressure becomes less than 0.7 MPa at 25 ° C, and the composition containing the liquid and the gas contains The following components (A), (B), (C), and (D): (A) a hydrocarbon mixture of carbon dioxide (B) of 0.1 to 3% by mass, the hydrocarbon mixture being selected from a mixture of hydrocarbons having a carbon number of 3 to 5 The content of the saturated hydrocarbon having a vapor pressure of 0.1 MPa or more and less than 0.5 MPa at 35 ° C in the above mixture is 80 to 100% by mass (C) selected from the group consisting of a nonionic surfactant and an anionic surfactant. 1 or 2 or more kinds of surfactants 0.1 to 25% by mass (D) comprising an acrylic polymer viscosity modifier 0.05 to 5% by weight, and the mass ratio of (A) to (B) (A: B) is 35:65 to 85:15; wherein the content of the hydrocarbon having 4 carbon atoms in the component (B) is 0.1 to 3% by mass in the total composition, and the viscosity of the liquid filled in the pressure vessel is 280. ~500,000mPa. s, the amount of carbon dioxide dissolved in the liquid in the pressure vessel is 500 to 25,000 ppm. The foamy skin coating agent of claim 1, wherein the amount of carbon dioxide dissolved in the liquid in the pressure resistant container is 500 to 18,000 ppm. The foamy skin coating agent of claim 1, wherein the (B) hydrocarbon mixture comprises n-butane having a carbon number of 4 and isobutane. The foamy skin coating agent of claim 1, wherein the (B) hydrocarbon mixture comprises a hydrocarbon having a carbon number of 4 and a hydrocarbon having a carbon number of 5, and a hydrocarbon having a carbon number of 5 is contained in the pressure vessel. The composition is 0.1 to 1.8% by mass. The foamy skin coating agent according to any one of claims 1 to 4, wherein the liquid in the composition has a pH of 2.5 to 7. The foamy skin coating agent according to any one of claims 1 to 4, wherein the pressure resistant container is an aerosol container of a single chamber configuration. The foamy skin coating agent according to any one of claims 1 to 4, wherein the pressure resistant container is a double-structured aerosol container. The foamy skin coating agent according to any one of claims 1 to 4, wherein the foam formed by ejecting the pressure vessel from the pressure vessel spreads on the skin to promote blood circulation of the skin. The foamy skin coating agent according to any one of claims 1 to 4, wherein the foam formed by spraying the pressure vessel from the pressure vessel spreads on the skin to massage the skin. The foamy skin coating agent according to claim 1, wherein the saturated hydrocarbon having a vapor pressure of 0.1 MPa or more and less than 0.5 MPa at the above-mentioned 35 ° C is selected from the group consisting of isobutane, n-butane, and isopentane. In the foamy skin coating agent of claim 1, in the composition of the hydrocarbon mixture, the hydrocarbon having 5 carbon atoms is B1, the hydrocarbon having 4 carbon atoms is B2, and the hydrocarbon having 3 carbon atoms is set. At B3, B1:B2:B3 (mass ratio) is 0~75:15~100:0~30. The foamy skin coating agent according to claim 1, wherein the viscosity adjusting agent is a synthetic system, a semisynthetic system, or a natural polymer.